Surface Mapping

​Surface chlorophyll data were collected on June 28, 2023 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as poor in the Seekonk River and Northern Providence River Channel, fair in the Edgewood Shoals area, and good in the Pawtuxet River and Southern Providence River areas. Overall, chlorophyll ranged from 0.53 to 43.90 µg/L with an average of 17.24 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

Surface chlorophyll data were collected on June 21, 2023 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. Unfortunately, only limited data between Field’s Point and Conimicut Point were collected due to an instrument logging error. The average chlorophyll concentrations were categorized as fair in the Northern Providence River Channel, Edgewood Shoals, and Pawtuxet River areas. Overall, chlorophyll ranged from 2.07 to 25.68 µg/L with an average of 12.64 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on June 14, 2023 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the Seekonk River, Upper Providence River Channel, and Pawtuxet River areas and as fair in the Edgewood Shoals and Southern Providence River areas. Overall, chlorophyll ranged between 0.98 and 15.51 µg/L with an average of 5.09 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

Surface chlorophyll data were collected on June 7, 2023 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in all areas surveyed. Overall, chlorophyll ranged between 0.35 and 3.45 µg/L with an average of 1.90 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on May 31, 2023 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the Southern Providence River area and fair in all the other areas surveyed. Overall, chlorophyll ranged between 3.01 and 16.90 µg/L with an average of 7.96 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on May 24, 2023 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the Seekonk River area and fair in all the other areas surveyed. Overall, chlorophyll ranged between 1.13 and 23.93 µg/L with an average of 8.84 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on May 18, 2023 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the areas surveyed. Overall, chlorophyll ranged between 1.79 and 7.20 µg/L with an average of 3.29 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on May 10, 2023 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the areas surveyed. Overall, chlorophyll ranged between 0.66 and 6.74 µg/L with an average of 1.61 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

​Surface chlorophyll data were collected on May 3, 2023 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the areas surveyed. Overall, chlorophyll ranged between 1.39 and 3.08 µg/L with an average of 2.14 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

Surface chlorophyll data were collected on April 26, 2023 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as fair in the Edgewood Shoals area and good in the other areas surveyed. Overall, chlorophyll ranged between 0.79 and 11.19 µg/L with an average of 2.60 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.